Improved mold for making corundum-wheels



E. H. DANFORTH.

MODE FOR MAKING GORUNDUM WHEELS. v

[ N 0. Patented June 13, 1865.

l was co. FNOTO LITNO WASHINGTON n c UNITED STATES PATENT OFFI E.

ELIJAH E'DANFQRT-H, or JAMESTOWN, NEW YORK.

IMPROVED MOLDFORMAKING co uNnuM-w EEL-s.

V Specification forming part of Letters Patent No.'4'8,160, dated June13, 1865.

To all whom it may concern;

Be it known that I, ELIJAH EDANFOBTH, of slamestowmin the county ofChautauqua and State. of New York, have invented a new and usefulmachine for renewing corundumwheels used by dentists for grinding teethwhen the surface has become imperfect, which I term a (lorundum-Pressfland I do hereby declare-that the following is a full, ,clear, andexact'description of the construction and op-v eration of thesame,reference being bad to the a'nnexeddrawings, makinga part of thisspecification, in which- Figure l' is a perspective view. Fig. 2 is abed-with a. screw-posti t-heeengter, Fig.3 is

curb; Fig. 4, a follower; Fig. 5, a nut.

Fig. A, the bed, is round, four inches inidi ameter' and one-half, of aninch thick, with the upper surface turned perfectly level' andthoroughly polished,=in the center of'which stands a screw-post twoandone-halt inches high and one-fourth of an inch thick.

Fig. B, the curb, is round, three inches in diameter, one and one-halfof an inchin height,

and one-fourth of an inch thick. The inner surface is turned andthoroughly polished.

The edges are alsoturned, so asto make a per- .fect joint w'henset onthe bed.

Fig. 0, the follower,'i,s of suflicient diameter to-fill the curbperfectly, one-fourth of an inch thick, or thicker, at the edge, so asto insure its passage evenly through the curb. It may also be thickenedin the center, so that it may be steadied by the. -'screw;- post, whichpasses through the center of it. Its lower surface is turnedlevelandthoroughly polished. 'In its center is a' hole one-fourth of an inchin diameter, corresponding perfectly with the diameter of thescrew-post, drilled at right angles with the polished-surface Fig. D,the nut, isone and one-half an-inch in diameter and one-half aninchthick, with a branch rising from eachside, so as tobeconveniently'operated with the thumb and finger.

' screw-post.

It contains a female screw, running through it at right angles with thelower turned surface,

corresponding perfectly with the threa dof the The capacity of the pressto receive or make large and small wheels maybe-produced by makingit'large or small as awhole, orbymaking a pluralityof curbsand followersof different sizes.

The press is made of cast-iron, except the screw-post, which ismade ofsteel. 7

Mode of using it: If you wish to make a new wheel, mix gum-shellac andcorundum in a common glue-pot. Oil the polished surfaces of the press,rubbing oi the surplus oil. Then place the curb onthe bed. Put into it asufficient quantityof the mixture to make a wheel 'of the desiredthickness. Adjust the follower in its place. the compound has timetocool butif it should get so cold as to prevent its being pressed intoa perfect wheel, place the press in an oven or. on a stove, where itwill heat gradually, lilll you will require a thin cloth holder tohandle it. Then screw it down firmly and cast the press into cold watera few moments, when it will be ready to take apart. If you wish to renewan old wheel, inclose it in the press, heat, screw down, and cool asabove. If you wish to make a new wheel of old ones or ofbroken ones, putthem in equally around the screwpost. Then proceed as described above.Be-

fore using the wheels washthem' in strong soap-suds.

What I claim as my invention, and desire to secure by Letters Patent, is

Not the base-A or the curb B, or any other part herein described, buttheir combination, as set forth and described, and represented in Fig.1, a perspective view.

ELIJAH H. DANFORTH.

Witnesses:

ED. 3. BOOTEY, JOHN J. KINNEY.

Put on thenut and run it down before-

